Thermodynamic cycle of ramjet in coordinate P-V, T-S calculation

Abstract

Thermodynamic cycle of ramjet in coordinate P-V, T-S, which is represented in the modern theory of air-jet engines (AJE), is performed with flow laws liquids and gases violation, because in zone H-B negative  (against the flow) gradient of static pressure takes place, which make impossible gas flow coming it to the engine. This is connected with that while formula of thrust air-jet engine calculation in zone of control  contour H-d paraboloid zone of braked flow generation had not be taken in to care, as a physical phenomenon, static pressure on the periphery of which, Pн*, is a maximum in zone H-B, providing on any of air-jet engine’s work regime positive (by the flow) static pressure gradient, even with the presence of negative (against the flow) static pressure gradient in measure of supersonic fly speed inlet nozzle that provides gas flow moving into the engine don’t breaking all mechanic laws of  liquids and gases expiration, which say that air flow moving into the engine is possible only with positive(by the flow) static pressure gradient existence.

In this paper, taking into account paraboloid zone of braked flow generation in control  contour H-d as a physical phenomenon, is given a correct description of the operating principle of the ramjet, and on this basis, developed the correct thermodynamic ramjet cycle in coordinate PV, TS, which is the fundamental basis of the progressive «United propulsion theory on continuous flow».